Send SMS V2.1

[randyvogl]

In the API Documentation https://developer.flowroute.com/api/messages/v2.1/send-an-sms/ it says that the callback url is not a required field. In your Library for the .net-sdk sample, it also has a default setup that shows it explicitly set to null. When I try to compile TestSDK it fails with the following error "ErrorException: Unprocessable Entity - You tried to enter an incorrect value." because the "dlr_callback field may not be null". Do I have to configure a callback URL?

private static void SendSMS(FlowrouteNumbersAndMessagingClient client, string from_did, string to_did, string callback=null)

[srbentley65]

@randyvogl I experienced the same thing. It was easy enough to comment out the JsonProperty("dlr_callback") section of the Message model. I also added the apparently required is_mms property and I got it working.